webconsole plugin has not started for some reason.Are you able to access /libs/cq/core/content/login.html1) cd /crx-quickstart/launchpad/felix2) grep -H "org.apache.felix.webconsole" . -R3) look for org.apache.felix.webconsole-<some number>.jar4) Go to that bundle "cd <bundle number>"5) Check bundle...

Please raise support ticket with proper information if the helpx link from bsloki is not helping.

By default indexing is transactional unless you add async property. So it will happen as soon as you update a node.

At this link you will find explain query tool (like explain plan in sql). http://adobe-consulting-services.github.io/acs-aem-tools/explain-query.htmlThis will tell you which indexes are used and you can try using different indexes and test.

If you have the index for the property that uniquely identifies the product node, it should be enough . SELECT * FROM [dam:Asset] AS s WHERE ISDESCENDANTNODE(s,'/content/dam/a/*/product') and [jcr:content/metadata/sku]='XYZ'will becomeSELECT * FROM [dam:Asset] AS s WHERE productProperty="product" an...

Please read through http://docs.adobe.com/docs/en/aem/6-0/deploy/upgrade/queries-and-indexing.html#Configuring%20the%20indexes .Find a unique property through which you can identify your nodes and index it.

Why dont you index tht property rather than regex.It will be much faster.

IIUC, is your qn "the component would have no nodes created under the page.how to display this via json call?"

Suppose you have a node /apps/brand. Then  you can get the node properties by http://localhost:4502/apps/brand.json

If you just want the json as is from the node, then you can use the oob json servlet.